文章目录
前言
随着我们不断学习框架,我们会接触spring、springmvc、mybatis等等一系列框架,框架学习多了我们使用，就必须整合才能更好的使用,而整合往往是一些刚刚学会框架的小白的痛苦,所以在下斗胆发表一篇文章供大家、以及我自己更好的学习,共同进步，如果文章中有不对的地方，希望大家能指出来,我及时改正
一、如何完成一个完整的SSM的整合的前提条件
-
创建一个maven项目需要添加web项目（基本环境准备）
-
整理好（Maven）依赖
-
创建数据库中所需要的库及表和idea中三层架构所需要的包
-
通过mybatis逆向工程自动生成pojo实体、Mapper接口以及Mapper.xml文件
5.配置数据连接的配置文件dbconfig.properties
6. 配置web.xml
- 配置spring的配置文件applicationContext.xml
- 配置springmvc的配置文件dispatcherServlet-servlet.xml
- 配置mybatis的配置文件mybatis-config.xml
二、具体步骤
1.引入maven依赖
代码如下（示例）：
<!--引入项目依赖的jar包 -->
<!-- SpringMVC、Spring -->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependencies>
<!--引入pageHelper分页插件 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.0.0</version>
</dependency>
<!-- MBG逆向工程 -->
<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.5</version>
</dependency>
<!-- spring整合web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!-- 返回json字符串的支持 -->
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.8</version>
</dependency>
<!--JSR303数据校验支持；tomcat7及以上的服务器，
tomcat7以下的服务器：el表达式。额外给服务器的lib包中替换新的标准的el
-->
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.4.1.Final</version>
</dependency>
<!-- Spring-Jdbc -->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!--Spring-test -->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!-- Spring面向切面编程 -->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!--MyBatis -->
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.2</version>
</dependency>
<!-- MyBatis整合Spring的适配包 -->
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<!-- 数据库连接池、驱动 -->
<!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.11</version>
</dependency>
<!-- （jstl，servlet-api，junit） -->
<!-- https://mvnrepository.com/artifact/jstl/jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
</dependency>
<!-- junit -->
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
2.建表建包
代码如下（示例）：
3.引入逆向工程配置文件并执行代码
代码如下（示例）：逆向工程mbg.xml文件
这里使用逆向工程的执行代码切记只执行一次,执行两次包括以上会有许多令人头疼的问题
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- 配置数据库连接 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/da?serverTimezone=UTC &\characterEncoding=utf8 &useUnicode=true &useSSL=false" userId="root"
password="2021fyl">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 指定javaBean生成的位置 -->
<javaModelGenerator targetPackage="com.atguigu.crud.bean"
targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!--指定sql映射文件生成的位置 -->
<sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 指定dao接口生成的位置，mapper接口 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.atguigu.crud.dao" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- table指定每个表的生成策略 -->
<table tableName="tbl_emp" domainObjectName="Employee"></table>
<table tableName="tbl_dept" domainObjectName="Department"></table>
</context>
</generatorConfiguration>
执行代码
public class MBGTest {
public static void main(String[] args) throws Exception {
List<String> warnings=new ArrayList<String>();
boolean overwrite=true;
File configFile=new File("mbg.xml");
ConfigurationParser cp=new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback=new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator=new MyBatisGenerator(config,callback,warnings);
myBatisGenerator.generate(null);
}
}
4.配置数据库连接配置文件
jdbc.jdbcUrl=jdbc:mysql://localhost:3306/ssm_crud?serverTimezone=UTC&\characterEncoding=utf8&useUnicode=true&useSSL=false
jdbc.driverClassName=com.mysql.cj.jdbc.Driver
jdbc.username=root
jdbc.password=2021fyl
5.配置web.xml
<!-- =================== 启动spring的容器 =================== -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- =========================================================-->
<!-- =================== springMvc前端控制器 =================== -->
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:dispatcherServlet-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- =========================================================-->
<!-- =================== 字符编码过滤器 =================== -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>forceRequestEncoding</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>forceResponseEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- =========================================================-->
<!-- =================== rustFul风格配置 =================== -->
<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- =========================================================-->
<filter>
<filter-name>HttpPutFormContentFilter</filter-name>
<filter-class>org.springframework.web.filter.HttpPutFormContentFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>HttpPutFormContentFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
6.配置spring的配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mybatis="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<context:component-scan base-package="com.atguigu">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- Spring的配置文件,这里主要配置和业务逻辑有关的 -->
<!-- 数据源,事务控制,xxx -->
<context:property-placeholder location="classpath:dbconfig.properties"/>
<bean id="pooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
<property name="driverClass" value="${jdbc.driverClassName}"></property>
<property name="password" value="${jdbc.password}"></property>
<property name="user" value="${jdbc.username}"></property>
</bean>
<!--配置和MyBatis的整合-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 指定mybatis全局配置文件的位置 -->
<property name="dataSource" ref="pooledDataSource"></property>
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<!-- 指定mybatis,mapper文件的位置 -->
<property name="mapperLocations" value="classpath*:mapper/*.xml"></property>
</bean>
<!--配置扫描器,将mybatis接口的实现加入到ioc容器中 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" id="mapperScannerConfigure">
<!-- 扫描所有dao接口的实现,加入到ioc容器中 -->
<property name="basePackage" value="com.atguigu.crud.dao"></property>
</bean>
<!--配置一个可以执行批量的sqlSession -->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>
<constructor-arg name="executorType" value="BATCH"></constructor-arg>
</bean>
<!-- =========================================================================-->
<!--事务控制的配置 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--控制住数据源 -->
<property name="dataSource" ref="pooledDataSource"></property>
</bean>
<!--开启基于注解的事务,使用xml配置形式的事务(必要主要的都是使用配置式) -->
<aop:config>
<!-- 切入点表达式 -->
<aop:pointcut id="txPoint" expression="execution(* com.atguigu.crud.service..*(..))"/>
<!-- 配置事务增强 -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"></aop:advisor>
</aop:config>
<!--配置事务增强,事务如何切入 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<!-- 所有方法都是事务方法 -->
<tx:method name="*"></tx:method>
<!-- 以get开始的所有方法 -->
<tx:method name="get*" read-only="true"></tx:method>
</tx:attributes>
</tx:advice>
<!-- Spring配置文件的核心点(数据源、与mybatis的整合,事务控制) -->
</beans>
7. 配置springmvc
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--SpringMVC的配置文件,包含网站跳转逻辑的控制,配置-->
<context:component-scan base-package="com.atguigu" use-default-filters="false">
<!--只扫描控制器. -->
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--配置试图解析器,方便页面返回-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--两个标准配置 -->
<!--将springmvc不能处理的请求交给tomcat -->
<mvc:default-servlet-handler/>
<mvc:annotation-driven></mvc:annotation-driven>
<!--能支持springmvc更高级的一些功能,JSR303校验,快捷的ajax...映射动态请求 -->
</beans>
8. 配置mybatis配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
<typeAliases>
<package name="com.atguigu.crud.bean"/>
</typeAliases>
<plugins>
<plugin interceptor= "com.github.pagehelper.PageInterceptor">
<!-- 分页参数合理化 -->
<property name="reasonable" value="true"/>
</plugin>
</plugins>
</configuration>
三、整合测试
1. 测试
在ssm整合的过程中,步骤有点多所以在这个过程要进行多测试这样子,才能及时发现错误,不然等所有代码都写完了,使用时报错,在一对代码面前,你将无从下手
/**
* 使用Spring测试模块提供的测试请求功能,测试curd请求的正确性
* Spring4测试的时候,需要servlet
*/
@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration(locations = {"classpath:applicationContext.xml", "file:E:\\SSM_CRUD\\src\\main\\resources\\dispatcherServlet-servlet.xml"})
public class MvcTest {
//传入Springmvc的ioc
@Autowired
WebApplicationContext context;
//虚拟mvc请求,获取到处理结果
MockMvc mockMvc;
@Before
public void initMockcMvc(){
mockMvc = MockMvcBuilders.webAppContextSetup(context).build();
}
@Test
public void testPage() throws Exception {
//模拟请求拿到返回值
MvcResult result = mockMvc.perform(MockMvcRequestBuilders.get("/emps").param("pn", "5")).andReturn();
//请求成功以后,请求域中会有pageInfo:我们可以取出pageInfo进行验证
MockHttpServletRequest request = result.getRequest();
PageInfo pi = (PageInfo) request.getAttribute("pageInfo");
System.out.println("当前页码:"+pi.getPageNum());
System.out.println("总页面"+pi.getPages());
System.out.println("总记录数"+pi.getTotal());
System.out.println("在页面需要连续显示的页码");
int[] nums =pi.getNavigatepageNums();
for(int i:nums){
System.out.println(" "+i);
}
//获取员工数据
List<Employee> list = pi.getList();
for(Employee employee :list){
System.out.println("ID:"+employee.getEmpId()+"==>Name:"+employee.getEmpName());
}
}
}
总结
*以上就是我个人对SSM整合的一些理解,如有不对,希望指出大家互相学习,共同进步 *
